-2/X＞0
    1/x＞1
    1/X＜0
    1-1/x大于0
    -1/X＜1
    2-x＜0
    2-1/x＞0
    2-1/√x＜0
    1-1/x＜0
    -1/X＜0
    2-1/X＜0
    T^(3/2)*e(-1.1/2/86/10^(-6)/T)<7/5.23*10^6
    (2 x +4)^2-4( x ^2+4 x )>0
    （15+X）/（5+X）=2
    93400/（X+1401）-93400/（x+1601）<40
    236-101*cos(-1.571*x)+0.1632*sin(-1.571*x)>294
    16.2-16.4/x*sin(x)-0.6*sin(x)=0 x>0
    (x-4/11)+x=36
    abs（3x+2）+abs（2x-3）＞6
    abs（2x-1）＞2x-1

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